Gitlab validation fails on Quay 3.5.6

# podman logs -f quay3
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                  \___\ by Red Hat
 Build, Store, and Distribute your Containers
Running all default registry services
Running init script '/quay-registry/conf/init/certs_create.sh'
Generating a RSA private key
......................................................................................................................................................................................................................................................................++++
............++++
writing new private key to 'mitm-key.pem'
-----
Running init script '/quay-registry/conf/init/certs_install.sh'
Running init script '/quay-registry/conf/init/copy_config_files.sh'
Running init script '/quay-registry/conf/init/d_validate_config_bundle.sh'
Validating Configuration
time="2021-09-07T12:43:29Z" level=debug msg="Validating AccessSettings"
...
time="2021-09-07T12:43:29Z" level=debug msg="Validating GitLabBuildTrigger"
time="2021-09-07T12:43:30Z" level=debug msg="GitLabBuildTrigger%!(EXTRA string=Could not verify GitLab OAuth credentials, []string=[GITLAB_TRIGGER_CONFIG.CLIENT_ID GITLAB_TRIGGER_CONFIG.CLIENT_SECRET])"
time="2021-09-07T12:43:30Z" level=debug msg="Validating GoogleLogin"
...
time="2021-09-07T12:43:30Z" level=debug msg="Validating UserVisibleSettings"
...
| GitHubLogin            | -                                                                                                                                     |     |
+------------------------+---------------------------------------------------------------------------------------------------------------------------------------+--------+
| GitLabBuildTrigger     | Could not verify GitLab OAuth credentials                                                                                             |   |
+------------------------+------------------------------------------------------------------------------------------------------------------------------------
...

GITLAB_TRIGGER_CONFIG: 
  CLIENT_ID: 45d41900b6da60da261b64a5f69879f20324e61d78f8f70ebc056f0a289d18db
  CLIENT_SECRET: d668d7a2a50c94b3b677f5f4d9557fb838892902a42e5b60eca9428306871084
  GITLAB_ENDPOINT: http://debian.example.com
GITLAB_TRIGGER_KIND: {}